<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>


<!-- th , thead , tbody, tfoot -->
<!-- th: 标识表格中的表头 , 用来取代第一行中的td -->


    <table border="1">
        <thead>
            <tr>
                <th>11</th>
                <th>11</th>
                <th>11</th>
                <th>11</th>
            </tr>
        </thead>

        <tbody>
            <tr>
                <td>21</td>
                <td>21</td>
                <td>21</td>
                <td>21</td>
            </tr>
            <tr>
                <td>31</td>
                <td>31</td>
                <td>31</td>
                <td>31</td>
            </tr>
        </tbody>


        <tfoot>
            <tr>
                <td>41</td>
                <td>41</td>
                <td>41</td>
                <td>41</td>
            </tr>
        </tfoot>

    </table>





</body>
</html>
